Welding is the process of joining two materials with the help of heat or pressure. The heat may be generated either from the combustion of gases, electric arc, electric resistance, or by chemical reaction. When heat is produced by means of electricity, it is called Arc Welding and when used the gases it is called Gas welding. In this shop, we cover the following welding technique and their mechanism and also discuss the tools. This is a password-protected file, Click on the link below to view the password of the pdf file.